I can't believe the difference taking a Vit D supplement has done for me. I live in Minnesota and am about to move to the UK, so I take 3 of the Nature Made Vit D 2000 i.u. pills in the morning. Plus I work the night shift currently and sleep during the day. So my exposure to sunlight is limited! Plus, I'd rather take a supplement than get too much sun by accident; as I am a red head as well. I have to say I am thrilled to be moving to the land of pasty-white people so I'll fit right in!